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Centre d'études spatiales de la biosphère |  |
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Centre d'études spatiales de la biosphère | |
| HAL: hal-00512488, version 1 |
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| Remote Sensing of Natural Covers by Synthetic Aperture Radars symposium, Ulan-Ude : Russian Federation (2010) |
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| COUPLING THE TEMPERATURE AND MINERALOGY DEPENDABLE SOIL DIELECTRIC MODEL AND A NUMERICAL MODEL TO COMPUTE SCATTERING COEFFICIENT OF COMPLEX MULTILAYER SOIL STRUCTURES |
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François Demontoux 1Clément Duffour 1 |
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| (2010-09-06) |
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| In this paper we present a study of a three dimensional (3D) numerical modeling approach based on the Finite Element Method (FEM) for the prediction of the bistatic coefficient of rough soil covered by a litter layer at L-band, including a comparison with another modeling approach. The numerical approach relies on the use of ANSYS' numerical computation software HFSS (High Frequency Structure Simulator), which in turn solves Maxwell's equations directly using the Finite Element Method. The computation of bistatic coefficient of ground structures need to introduce to the numerical model the dielectric properties of soil. We use the TMD SDM (Temperature and Mineralogy Dependable Soil Dielectric Model) which is a dielectric mixing model to predict the permittivity of the soil (V. Mironov et al.). It is useful in the context of the SMOS (Soil Moisture and Ocean Salinity) or SMAP (Soil Moisture Active & Passive) mission since our numerical approach can be extended to model the scattering and emission of heterogeneous media including complex multilayer systems such as the radiometric L-band emission or the bistatic coefficient of soil and litter layers in forests. In this paper we validate the approach by comparing predictions of rough surface scattering against the Method of Moments (MoM). |
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| 1: | Laboratoire de l'intégration, du matériau au système (IMS) |
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CNRS : UMR5218 – Université Sciences et Technologies - Bordeaux I – Institut Polytechnique de Bordeaux |
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| 2: | Centre d'études spatiales de la biosphère (CESBIO) |
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CNRS : UMR5126 – Institut de recherche pour le développement [IRD] – CNES – Observatoire Midi-Pyrénées – INSU – Université Paul Sabatier [UPS] - Toulouse III |
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| 3: | Kirensky Institute of Physics |
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Russian Academy of Science |
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| 4: | Écologie fonctionnelle et physique de l'environnement (EPHYSE - UR1263) |
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Institut national de la recherche agronomique (INRA) : UR1263 |
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| 5: | Radiophysics of remote sensing laboratory |
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Kirensky Institute of Physics |
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| Subject | : | Engineering Sciences/Electromagnetism Sciences of the Universe/Continental interfaces, environment Environmental Sciences/Global Changes |
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| Electromagnetic scattering by rough surfaces – microwave scattering – numerical simulation – soil-litter structures |
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| hal-00512488, version 1 | |
| http://hal.archives-ouvertes.fr/hal-00512488 | |
| oai:hal.archives-ouvertes.fr:hal-00512488 | |
| From: François Demontoux | |
| Submitted on: Monday, 30 August 2010 15:30:56 | |
| Updated on: Monday, 30 August 2010 15:30:56 | |
